* The name is misspelled: There might be a slight error in the spelling. Try searching for variations like Edna Douglass, Ednah Douglas, or a different middle name.
* The author is relatively unknown: They may have published works under a different name, or their writings might be obscure or niche.
* The author is not published: They may have written for personal enjoyment or have unpublished works.
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* Genre: What type of books might Edna Douglas have written?
* Approximate time period: When were their works published, if known?
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